There is a great alternative to traditional air conditioners. It’s cost effective in the long run and energy efficient immediately Mini-splits are heating and cooling systems that allow you to control the temperatures in individual rooms or spaces. Mini-split systems have two main components — an outdoor compressor/condenser and an indoor air-handling unit(s) (evaporator). A mini-split ductless system costs about half of what it costs to install a central unit. Unlike ducted systems, mini-splits have no energy loss, so they are more energy efficient and cost less to operate. Small in size.